Bring on the noise
It was inevitable, but now we have a comparison of the Canon EOS C300 & Red Scarlet when it comes to high ISO noise performance.

From Cinema5D

In all, it’s clear that the C300’s new sensor excels in low light situations, which will allow for whole new ways of filmmaking in dark zones, were much less artificial light can be used to accentuate something.

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aaronofnero

Definitely the sort of situation where, if you could afford to own both cameras, then it'd probably be beneficial to do so. C300 definitely appears to have a nice dynamic range, and allow for usable footage in scenes that you may not have the time or money to light properly / extensively. On the other hand, The Scarlet I would imagine has a stronger performance for preset scenes with the appropriate lighting in mind. Nonetheless, an interesting analysis. Note the comparison of a 35mm f/1.4 on the scarlet to the 77mm f/2.5 on the c300.. i suppose some of that color noise and banding could be further reduced with a 35 f/1.4 on the c300, and shoot at a lower ISO. Very excited to see these sorts of comparisons though.

So they did a "test"... with different apertures and different exposures and gains and focal lengths? I mean wtf... If you want to do side by side comparisons at least make sure the premise is the same for both cameras. Bloody idiots.